1679885681 has 8 divisors (see below), whose sum is σ = 1686567744. Its totient is φ = 1673217520.

The previous prime is 1679885663. The next prime is 1679885693. The reversal of 1679885681 is 1865889761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1679885681 - 2²⁶ = 1612776817 is a prime.

It is a super-2 number, since 2×1679885681² = 5644031802457667522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1679885681.

It is not an unprimeable number, because it can be changed into a prime (1679885611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283691 + ... + 289551.

It is an arithmetic number, because the mean of its divisors is an integer number (210820968).

Almost surely, 2^1679885681 is an apocalyptic number.

It is an amenable number.

1679885681 is a deficient number, since it is larger than the sum of its proper divisors (6682063).

1679885681 is an equidigital number, since it uses as much as digits as its factorization.

1679885681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951.

The product of its digits is 5806080, while the sum is 59.

The square root of 1679885681 is about 40986.4084911084. The cubic root of 1679885681 is about 1188.7574255277.

The spelling of 1679885681 in words is "one billion, six hundred seventy-nine million, eight hundred eighty-five thousand, six hundred eighty-one".